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Table 1 Baseline characteristics of patients with EGC

From: The effect of Helicobacter pylori eradication on prognosis of postoperative early gastric cancer: a multicenter study

  Total Group A Group B P value
Patient number 429 268 161  
Age (mean ± SD), years 55.94 ± 9.50 55.90 ± 9.49 56.01 ± 9.53 0.908
 ≥60 157 (36.6%) 99 (36.9%) 58 (36.0%) 0.849
  < 60 272 (63.4%) 169 (63.1%) 103 (64.0%)  
Gender     0.667
 Male 272 (63.4%) 172 (64.2%) 100 (62.1%)  
 Female 157 (36.6%) 96 (35.8%) 61 (38.9%)  
Tumor location     0.990
 Upper 58 (13.6%) 36 (13.4%) 22 (13.7%)  
 Middle 140 (32.6%) 87 (32.5%) 53 (32.9%)  
 Lower 231 (53.8%) 145 (54.1%) 86 (53.4%)  
Tumor size, mean ± SD, mm 24.5 ± 10.6 23.9 ± 10.5 25.3 ± 10.7 0.176
 ≥20 267 (62.2%) 159 (59.3%) 108 (67.1%) 0.109
  < 20 162 (37.8%) 109 (40.7%) 53 (32.9%)  
Depth of invasion     0.525
 Mucosa 219 (51.0%) 140 (52.2%) 79 (49.1%)  
 Submucosa 210 (49.0%) 128 (47.8%) 82 (50.9%)  
Macroscopic type     0.510
 Depressed 229 (53.4%) 147 (54.9%) 82 (50.9%)  
 Flat 136 (31.7%) 85 (31.7%) 51 (31.7%)  
 Elevate 64 (14.9%) 36 (13.4%) 28 (17.4%)  
Node metastasis     0.924
 Positive 71 (16.6%) 44 (16.4%) 27 (16.8%)  
 Negative 388 (83.4%) 224 (83.6%) 134 (83.2%)  
Histology     0.404
 Undifferentiated type 218 (50.8%) 132 (49.3%) 86 (53.4%)  
 Differentiated type 211 (49.2%) 136 (50.7%) 75 (46.6%)  
  1. The data are expressed as the number, with the percentage in parentheses
  2. SD Standard deviation